DTC P0793:00 [DJVA-EL]

id0502l1822300

DTC P0793:00

Primary pulley speed sensor signal not input

DETECTION CONDITION

•  Condition: TCM normal during engine rotation

•  Status: Primary pulley speed sensor signal not input during secondary pulley speed sensor 4-pulse detection

•  Period: Confirmed 500 times

Diagnostic support note

•  The AT warning light illuminates if the TCM detects the above malfunction condition during the first drive cycle.

•  PENDING CODE is not available.

•  The DTC is stored in the TCM memory.

POSSIBLE CAUSE

•  Coupler component connector or terminal malfunction

•  Short to GND in wiring harness for primary pulley speed sensor terminal B and TCM terminal A19

•  Short to GND in wiring harness for primary pulley speed sensor terminal A and TCM terminal A9

•  Short to power supply in wiring harness for primary pulley speed sensor terminal B and TCM terminal A19

•  Short to power supply in wiring harness for primary pulley speed sensor terminal A and TCM terminal A9

•  Primary pulley speed sensor Solenoid malfunction

•  TCM connector or terminal malfunction

•  Open circuit in wiring harness for primary pulley speed sensor terminal B and TCM terminal A19

•  Open circuit in wiring harness for primary pulley speed sensor terminal A and TCM terminal A9

•  TCM malfunction

DTC P0793:00	Primary pulley speed sensor signal not input
DETECTION CONDITION	• Condition: TCM normal during engine rotation • Status: Primary pulley speed sensor signal not input during secondary pulley speed sensor 4-pulse detection • Period: Confirmed 500 times Diagnostic support note • The AT warning light illuminates if the TCM detects the above malfunction condition during the first drive cycle. • PENDING CODE is not available. • The DTC is stored in the TCM memory.
POSSIBLE CAUSE	• Coupler component connector or terminal malfunction • Short to GND in wiring harness for primary pulley speed sensor terminal B and TCM terminal A19 • Short to GND in wiring harness for primary pulley speed sensor terminal A and TCM terminal A9 • Short to power supply in wiring harness for primary pulley speed sensor terminal B and TCM terminal A19 • Short to power supply in wiring harness for primary pulley speed sensor terminal A and TCM terminal A9 • Primary pulley speed sensor Solenoid malfunction • TCM connector or terminal malfunction • Open circuit in wiring harness for primary pulley speed sensor terminal B and TCM terminal A19 • Open circuit in wiring harness for primary pulley speed sensor terminal A and TCM terminal A9 • TCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related service information availability. • Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information. • If the vehicle is not repaired, go to the next step.
1		No	Go to the next step.
2	INSPECT PRIMARY PULLEY SPEED SENSOR CONNECTOR FOR POOR CONNECTION • Switch the ignition to OFF. • Disconnect the primary pulley speed sensor connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion) • Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 8.
2		No	Go to the next step.
3	INSPECT PRIMARY PULLEY SPEED SENSOR CIRCUIT FOR SHORT TO GND • Switch the ignition to OFF. • Inspect for continuity between the following circuits: ― Primary pulley speed sensor terminal B (wiring harness-side) and body GND ― Primary pulley speed sensor terminal A (wiring harness-side) and body GND • Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to GND, then go to Step 8.
3		No	Go to the next step.
4	INSPECT PRIMARY PULLEY SPEED SENSOR CIRCUIT FOR SHORT TO POWER SUPPLY • Switch the ignition to ON (Engine off). • Measure the voltage between the following circuits: ― Primary pulley speed sensor terminal B (wiring harness-side) and body GND ― Primary pulley speed sensor terminal A (wiring harness-side) and body GND • Is the voltage B+?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 8.
4		No	Go to the next step.
5	INSPECT PRIMARY PULLEY SPEED SENSOR • Inspect the primary pulley speed sensor. (See PRIMARY PULLEY SPEED SENSOR INSPECTION [DJVA-EL].) • Is there any malfunction? • Is there continuity?	Yes	Go to the next step.
5		No	Replace the primary pulley speed sensor, then go to the Step 8. (See PRIMARY PULLEY SPEED SENSOR REMOVAL/INSTALLATION [DJVA-EL].)
6	INSPECT TCM CONNECTOR FOR POOR CONNECTION • Switch the ignition to OFF. • Disconnect the TCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion) • Is there any malfunction?	Yes	Repair or replace the terminal, then go to the Step 8.
6		No	Go to the next step.
7	INSPECT PRIMARY PULLEY SPEED SENSOR CONNECTOR FOR OPEN CIRCUIT • Switch the ignition to OFF. • Inspect for continuity between the following circuits: ― Primary pulley speed sensor terminal B (wiring harness-side) and TCM terminal A19 (wiring harness-side) ― Primary pulley speed sensor terminal A (wiring harness-side) and TCM terminal A9 (wiring harness-side) • Is there continuity?	Yes	Go to the next step.
7		No	Repair or replace the wiring harness for a possible open circuit, then go to the next step.
8	VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all the disconnected connectors. • Clear the DTC using the M-MDS. • Perform the following procedure to ensure that the DTC has been resolved: 1. Start the engine. 2. Vehicle driven 11 min or more. • Is the same DTC present?	Yes	Perform the following procedure, then go to next step. 1. Replace the TCM. (See TCM REMOVAL/INSTALLATION [DJVA-EL].) 2. Perform TCM learning. (See TCM LEARNING [DJVA-EL].)
8		No	Go to the next step.
9	VERIFY NO DTCs ARE PRESENT • Perform the “Reading DTCs Procedure”. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [DJVA-EL].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [DJVA-EL].)
9		No	DTC troubleshooting completed.